Avg secure browser not responding

I receive Emails some contain PDF and i can't open the files reason: AVG Secure browser not responding. I have tried to install the free AVG antivirus protection and it still not responding? 
What should I do?

Hi Josh,

We replied to your original posts. Please keep up the conversation in a single posts to get speedy reply. Thank you.

Hi Josh,

We replied to your original posts. Please keep up the conversation in a single posts to get speedy reply. Thank you.